Port Antonio Weather in September
Port Antonio in September averages 30°C (86°F) during the day and 25°C (77°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Port Antonio in September
Typically, you can expect about 14 days of rain this month, with 154 mm (6.1 in) on average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Port Antonio in September
In September, Port Antonio sees high temperatures, with highs of 30°C (86°F). Nights drop to around 25°C (77°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights stay warm at around 25°C (77°F), so light bedding and good ventilation are worth thinking about. This month tends to be the warmest of the year. Light, comfortable clothing will serve you well.
Sunshine in Port Antonio in September
Expect sunny days throughout the month, with an estimated 228 hours of sunshine. This makes it a pleasant time to visit Port Antonio.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Port Antonio. Our weather planner can help you explore destinations with more pleasant weather conditions.
Port Antonio Temperature in September
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Port Antonio Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Port Antonio - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Port Antonio typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Port Antonio in September
Browse day-by-day weather records for Port Antonio spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Port Antonio historical weather extremes in September
According to our 20 years of weather records for Port Antonio, the following extremes were recorded between 2005 and 2025.
- On September 25, 2006, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
- Port Antonio experienced its chilliest September day on September 28, 2010, reaching only 26°C (79°F).
- The lowest overnight temperature recorded in September was 22°C (72°F) (September 29, 2010).
Best Places in Jamaica in September
Find out more about the weather in Jamaica and which places have the best travel conditions in this month. See all of Jamaica in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Port Antonio in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Port Antonio in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming8/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Port Antonio 3-Day Forecast
Temperature Rainfall Sunshine Humidity
See the full Port Antonio climate overview or explore weather in Jamaica.
Popular in September
Where to go in September - average daytime high across popular destinations.
Runaway Bay
31°C (88°F) Falmouth31°C (88°F) Montego Bay32°C (90°F) Ocho Rios
31°C (88°F) Kingston30°C (86°F) Treasure Beach
31°C (88°F) Negril31°C (88°F) Port Antonio30°C (86°F) 
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